GB1522972A - Process for the quality of steel sections - Google Patents

Process for the quality of steel sections

Info

Publication number
GB1522972A
GB1522972A GB4075975A GB4075975A GB1522972A GB 1522972 A GB1522972 A GB 1522972A GB 4075975 A GB4075975 A GB 4075975A GB 4075975 A GB4075975 A GB 4075975A GB 1522972 A GB1522972 A GB 1522972A
Authority
GB
United Kingdom
Prior art keywords
tempered
zone
section
feb
march
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4075975A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centre de Recherches Metallurgiques CRM ASBL
Original Assignee
Centre de Recherches Metallurgiques CRM ASBL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centre de Recherches Metallurgiques CRM ASBL filed Critical Centre de Recherches Metallurgiques CRM ASBL
Publication of GB1522972A publication Critical patent/GB1522972A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/02—Hardening articles or materials formed by forging or rolling, with no further heating beyond that required for the formation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes

Abstract

1522972 Quenching steel sections CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE 6 Oct 1975 [4 Oct 1974 3 Feb 1975 28 Feb 1975(3) 7 March 1975 25 March 1975] 40759/75 Heading C7N A steel section having at least one flat face is surface quenched as it leaves the finishing stand of a rolling mill by a suspension of liquid in gas, the conditions being such that the unquenched region of the cross-section retains sufficient heat to subsequently temper the quenched region while itself being converted to ferrite and carbides. The liquid is preferably water or a solution of a mineral salt and/or surfactant and is suspended in air or steam. In a preferred embodiment the conditions are such that the final product has in cross-section a microstructure including one zone parallel to the flat face of the section and consisting of tempered martensite and non-tempered bainite, with below that a zone of non-tempered bainite and non-tempered ferrite-pearlite. There may additionally be an outer most zone of tempered martensite and an inner most zone of non-tempered ferritepearlite. Suitable forms of apparatus are shown in Figs. 2 and 4. In the former a spray manifold chamber moves on rollers 15 along the flange of beam 11.
GB4075975A 1974-10-04 1975-10-06 Process for the quality of steel sections Expired GB1522972A (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
BE820750 1974-10-04
BE825138 1975-02-03
BE826200 1975-02-28
BE826202 1975-02-28
BE826203 1975-02-28
BE826456 1975-03-07
BE827175 1975-03-25

Publications (1)

Publication Number Publication Date
GB1522972A true GB1522972A (en) 1978-08-31

Family

ID=27560803

Family Applications (2)

Application Number Title Priority Date Filing Date
GB4075975A Expired GB1522972A (en) 1974-10-04 1975-10-06 Process for the quality of steel sections
GB4872677A Expired GB1522973A (en) 1974-10-04 1975-10-06 Steel sections having microstructure

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4872677A Expired GB1522973A (en) 1974-10-04 1975-10-06 Steel sections having microstructure

Country Status (3)

Country Link
JP (1) JPS5163311A (en)
GB (2) GB1522972A (en)
LU (1) LU73512A1 (en)

Also Published As

Publication number Publication date
LU73512A1 (en) 1976-04-13
GB1522973A (en) 1978-08-31
JPS5163311A (en) 1976-06-01
JPS6123247B2 (en) 1986-06-05

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19951005